Weaving shuttle with threadcutting anvil



1953 w. J. GOSSELIN 2,649,119

WEAVING SHUTTLE WITH THREAD-CUTTING ANVIL Filed Aug. 9, 1952 flwerzior' W 1 65 J flaaselirv 9% @0 1 rm? Patented Aug. 18, 1953 WEAVING SHUTTLE WITH THREAD- CUTTIN G ANVIL Wilfrid J. Gosselin, Methuen, Mass., assignor to U S Bobbin & Shuttle Company, Lawrence, Mass., a corporation of Ithode Island Application August 9, 1952, Serial No. 303,592

3 Claims. (01. 139-196) This invention pertains to shuttles of the kind which are used in automatic bobbin replenishing looms. When in the operation of such a loom the bobbin is ejected from the shuttle during replacement, the ejected bobbin has a trailing yarn end extending through the shuttle eye and shuttle box to the selvage of the cloth. In order to sever this yarn end and allow the bobbin to draw the yarn end out of the shuttle eye and shuttle box, the loom is provided with a thread cutter which, at the proper time, is advanced toward that wall of the shuttle which has the eye and the yarn guiding groove. This cutter has a chisel edge which engages and presses the yarn against an anvil plate of metal which is set into the shuttle wall, thus severing the yarn. Because of the rapidly repeated reversal of motion of the shuttle, the inertia force exerted by the anvil plate upon the material defining the walls of the cavity in which the plate is customarily seated, tends rapidly to enlarge the cavity, with consequent loosening of the plate. When a wooden shuttle wall has an outer facing of hard, dense material, such as indurated fibre or plastic, the cavity for the reception for the plate is usually behind this facing, so that it still seats against the relatively soft wood.

An object of the present invention is to provide a shuttle having an inset thread-cutting anvil with provision for holding the anvil, so that it will not loosen during use. A further object is to provide a shuttle having a wall of hard, dense material or having at least an outer ply or facing of such material, with means for securely holding an anvil plate, said holding means comprising a layer of permanently elastic adhesive interposed between the plate and a surface of said dense, hard material. Other and further objects and advantages of the invention will be pointed out in the following more detailed description and by reference to the accompanying drawings wherein,

Fig. l is a fragmentary elevation of a weaving shuttle embodying the present invention and showing that side of the shuttle in which the yarn delivery eye is formed;

Fig. 2 is a fragmentary vertical section, to larger scale than Fig. l, substantially on the line 2--2 of Fig. l and Fig. 3 is a perspective view of the anvil plate, to somewhat smaller scale than Fig. 2, removed from the shuttle.

Referring to the drawings, the numeral l indicates a weaving shuttle of conventional type, in this case comprising a body portion of wood having spaced side walls, of which the wall 2 only is indicated .(Fig. 2), these walls defining between them the usual chamber 3 for the reception of the bobbin. In one side wall of the shuttle body, for example the Wall 2, there is formed the yarn delivery eye 3, and in the horizontal plane of this delivery eye there is provided the usual longitudinally extending yarn receiving groove or channel 5.

As indicated in Fig. 2, the wall 2 of this shuttle body is provided with an external facing 6 of a material which is tougher, denser and more wear resistant than wood. For example, this facing 6 may be of indurated fibre; a plastic; or a textile fabric impregnated with plastic, such as customarily employed in the manufacture of commercial shuttles. As shown in Fig. 2, this facing 8 extends down below and provides a wear-resisting shoe 1 for the bottom of the shuttle.

Within the facing ply 6, there is formed a window aperture 8, Fig. 2 which is horizontally elongate and here shown (Fig. 1) as having horizontal upper and lower edges and curved ends. This window intersects the groove 5 and extends through the entire thickness of the ply 6 and provides an opening through which the thread cutter (not shown) passes for engagement with the anvil plate.

As indicated in dotted lines in Fig. 1, the wood of the wall 2 of the shuttle is provided with a recess 9 which is somewhat longer than the window 8, and as shown in Fig. 1, slightly wider in a vertical direction than the window, this recess or cavity 9 being symmetrical with respect to the window. In this recess or cavity a, there is arranged a secondary ply or layer I 0 of hard, dense material, for example like that of the facing 6. This secondary ply or layer [0 fills the cavity 9 formed in the wood of the shuttle body, and since the cavity 9 is of larger dimensions than the window 8, the margins of the part 9 extend beyond the confines of the window. The part In is inserted in the recess 9 before the application of the facing ply, and is firmly bonded to the walls of the cavity and preferably integrated with the facing 6 when the latter is app ied.

Within the forward face of this ply Hi, there is formed a shallow cavity which may for example be of the same size as the window 8, although it is preferred to make it somewhat longer and Wider than the window 8. Thus, portions of the ply 6 as indicated at H and I2 overhang marginal portions of this shallow cavity in the part. III. This shallow cavity has the rear wall [3 (Fig. 2)

the resilient adhesive layer I4 and preferably with marginal portions of its front surface overhung by parts II, I2, etc., of the facing 6, and with its front face in a vertical plane to the rear of the bottom of the groove 5. The resilient layer I4 may, for example, be of the nature of a rubber cement capable of making a good adhesive bond with the metal plate I5 and also with the wall I 3. Other adhesives than rubber, which do not tend to crystallize or become brittle, when subjected to rapidly repeated shocks for long periods, may be used, for instance phenol base resins made flexible with glycerol, or condensation products of glycerine and phthalic acid. After the parts have been assembled, the anvil plate I 5 functions as is usual to form a, rigid backing for the yarn as the cutter is advanced inwardly to cut the yarn. Since the plate is held within a rigid holder or frame, formed by the parts 6 and I0, and since this frame is irnmovably fixed and bonded to the wood of the shuttle, the eifect of inertia, in loosening the anvil is substantially negligible, and by the use of a permanently resilient adhesive for affixing the anvil to the rear panel ii) of this frame, it remains secure in position throughout the life of the shuttle. I

While one desirable embodiment of the invention is herein described by Way of example, it is to be understood that the invention is broadly inclusive of any and all modifications falling within the scope of the appended claims.

I claim:

1. A weaving shuttle having a side wall provided with a longitudinally extending thread groove, said wall having a depression which intersects said groove, said Wall comprising a layer 4 of hard, non-absorbent material which forms the bottom wall of said depression, an anvil plate Within the depression, the exposed face of the anvil plate being in a vertical plane which is beyond the bottom of the thread groove, and a layer of permanently resilient adhesive bonding the opposite face of the plate to said dense, hard material of the shuttle wall.

2. A weaving shuttle having a wooden body comprising spaced side walls defining a bobbin receiving chamber between them, one at least of said side Walls having a facing ply of hard, dense, non-absorbent material, said ply having a longitudinally extending thread groove in its outer surface and havin'ga horizontal elongate depression interrupting .said groove and extending through the thickness of said facing ply, a second ply, also .of hard, dense material, arranged to form a bottom Wall for said depression, an anvil plate within the depression, and a permanently resilient ply of adhesive interposed between the plate and the bottom wall of the depression.-

3. A weaving shuttle having a side wall provided with a facing-ply of hard, dense, nonabsorbent material,-the facing ply having therein an elongate window aperture, a plyof hard, dense material underlying said facing ply at the region of the window and having therein a shallow cavity, portions of the facing ply overhanging the cavity, a metallic anvil plate within the cavity in said second ply and having marginal portions which are behind the overhanging portion of the front ply, and a layer of permanently resilient adhesive bonding the anvil plate and said second p y- WILFRID J. GOSSELIN.

Name Date 2,172,336 Turner Sept. 5, 1939 2,352,366 Brown June 27, 1 944 

